linux-kernel - Re: [PATCH 03/13] filemap: align the index to mapping_min

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Message-ID: <mm47tgwkrk3glymx6hzgp5bshnzqwqt26ja46xckfzzbjuwzic@oupjlfibn4nm>
Date: Tue, 27 Feb 2024 18:09:57 +0100
From: "Pankaj Raghav (Samsung)" <kernel@...kajraghav.com>
To: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: Matthew Wilcox <willy@...radead.org>, linux-xfs@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, david@...morbit.com, 
	chandan.babu@...cle.com, akpm@...ux-foundation.org, mcgrof@...nel.org, ziy@...dia.com, 
	hare@...e.de, djwong@...nel.org, gost.dev@...sung.com, linux-mm@...ck.org, 
	Pankaj Raghav <p.raghav@...sung.com>
Subject: Re: [PATCH 03/13] filemap: align the index to mapping_min_order in
 the page cache

> > 
> > I have one question while I have you here. 
> > 
> > When we have this support in the page cache, do you think bcachefs can make
> > use of this support to enable bs > ps in bcachefs as it already makes use 
> > of large folios? 
> 
> Yes, of course.
> 
> > Do you think it is just a simple mapping_set_large_folios ->
> > mapping_set_folio_min_order(.., block_size order) or it requires more
> > effort?
> 
> I think that's all that would be required. There's very little in the
> way of references to PAGE_SIZE in bcachefs.

Sweet. I will take a look at it once we get this upstream.

--
Pankaj